74 lines
2.0 KiB
C
Executable File
74 lines
2.0 KiB
C
Executable File
/*
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* Cryptographic API.
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*
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* SHA-256, as specified in
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* http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
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*
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* SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
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*
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* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef SHA256_FMP_H
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#define SHA256_FMP_H
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#include <linux/types.h>
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#define SHA256_DIGEST_SIZE 32
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#define SHA256_BLOCK_SIZE 64
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#define SHA256_DIGEST_LENGTH SHA256_DIGEST_SIZE
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struct sha256_state {
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u32 state[SHA256_DIGEST_SIZE / 4];
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u64 count;
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u8 buf[SHA256_BLOCK_SIZE];
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};
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struct shash_desc {
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struct sha256_state __ctx;
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};
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typedef struct shash_desc SHA256_CTX;
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typedef void (sha256_block_fn)(struct sha256_state *sst, u8 const *src,
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int blocks);
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/* Initialises desc
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* Returns 0 at success, nonzero otherwise
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*/
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int sha256_init(struct shash_desc *desc);
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/* Adds len bytes from data to desc.
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* Returns 0 at success, nonzero otherwise
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*/
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int sha256_update(struct shash_desc *desc, const u8 *data,
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unsigned int len);
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/* Adds the final padding to desc and writes the resulting digest
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* to out, which must have at least SHA256_DIGEST_SIZE bytes of space.
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* Returns 0 at success, nonzero otherwise
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*/
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int sha256_final(struct shash_desc *desc, u8 *out);
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/* Writes the digest of len bytes from data to out. Returns out.
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* Out should be preallocated at least SHA256_DIGEST_SIZE length.
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* Returns 0 at success, nonzero otherwise
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*/
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int sha256(const u8 *data, unsigned int len, u8 *out);
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/* desc dup
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* Returns 0 at success, nonzero otherwise
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*/
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int sha256_desc_copy(struct shash_desc *dst, const struct shash_desc *src);
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#endif /* SHA256_FMP_H */
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